摘要
介绍了四路激光跟踪干涉三维坐标测量系统的工作原理 ,由于系统具有冗余特性 ,可以实现系统的自标定。重点研究了系统自标定的原理 ,采用初始动点的概念代替初始长度 ,建立了正确的自标定模型。提出了系统的标定和测量过程相互统一的新特征。最后综合运用各种数值算法对自标定模型进行了计算机仿真。仿真结果表明 ,激光跟踪干涉仪的测量误差对自标定参数的计算结果有重大影响。因此 ,自标定过程中需要保证激光跟踪干涉仪的测距精度。
The four beam laser tracking system for 3D coordinate measurement is presented.By taking advantage of the redundancy of the system,self calibration can be realized.The principle of system self calibration is discussed,and its model is established by using the concept of the initial measuring point rather than initial measuring length.The new feature that system calibration and measurement can be fully unified is also proposed.Finally,the results of computer simulation for model of the self calibration are obtained with several iterative nonlinear algorithms, and it is shown that the error of the laser tracking interferometer has great effect on the self calibration.Hence,the accuracy of laser tracking interferometer should be high enough to ensure the accuracy of system self calibration.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2003年第2期205-210,共6页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金资助项目 ( 5 9875 0 64 )
关键词
激光跟踪系统
坐标测量
自标定
仿真
激光干涉仪
Laser tracking system Coordinate measurement Self calibration Simulation
